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bitwarden-browser/spec/common/misc/throttle.spec.ts

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import { sequentialize } from '../../../src/misc/sequentialize';
import { throttle } from '../../../src/misc/throttle';
describe('throttle decorator', () => {
it('should call the function once at a time', async () => {
const foo = new Foo();
const promises = [];
for (let i = 0; i < 10; i++) {
promises.push(foo.bar(1));
}
await Promise.all(promises);
expect(foo.calls).toBe(10);
});
it('should call the function once at a time for each object', async () => {
const foo = new Foo();
const foo2 = new Foo();
const promises = [];
for (let i = 0; i < 10; i++) {
promises.push(foo.bar(1));
promises.push(foo2.bar(1));
}
await Promise.all(promises);
expect(foo.calls).toBe(10);
expect(foo2.calls).toBe(10);
});
it('should call the function limit at a time', async () => {
const foo = new Foo();
const promises = [];
for (let i = 0; i < 10; i++) {
promises.push(foo.baz(1));
}
await Promise.all(promises);
expect(foo.calls).toBe(10);
});
it('should call the function limit at a time for each object', async () => {
const foo = new Foo();
const foo2 = new Foo();
const promises = [];
for (let i = 0; i < 10; i++) {
promises.push(foo.baz(1));
promises.push(foo2.baz(1));
}
await Promise.all(promises);
expect(foo.calls).toBe(10);
expect(foo2.calls).toBe(10);
});
it('should work together with sequentialize', async () => {
const foo = new Foo();
const promises = [];
for (let i = 0; i < 10; i++) {
promises.push(foo.qux(Math.floor(i / 2) * 2));
}
await Promise.all(promises);
expect(foo.calls).toBe(5);
});
});
class Foo {
calls = 0;
inflight = 0;
@throttle(1, () => 'bar')
bar(a: number) {
this.calls++;
this.inflight++;
return new Promise((res) => {
setTimeout(() => {
expect(this.inflight).toBe(1);
this.inflight--;
res(a * 2);
}, Math.random() * 10);
});
}
@throttle(5, () => 'baz')
baz(a: number) {
this.calls++;
this.inflight++;
return new Promise((res) => {
setTimeout(() => {
expect(this.inflight).toBeLessThanOrEqual(5);
this.inflight--;
res(a * 3);
}, Math.random() * 10);
});
}
@sequentialize((args) => 'qux' + args[0])
@throttle(1, () => 'qux')
qux(a: number) {
this.calls++;
this.inflight++;
return new Promise((res) => {
setTimeout(() => {
expect(this.inflight).toBe(1);
this.inflight--;
res(a * 3);
}, Math.random() * 10);
});
}
}